Mitsubishi Electric FR-A700 Series Installation Manuallines page 37

7.9 Main differences with the A700 series NA, EC, and CHT models
Overload current rating
PWM carrier frequency
Soft-PWM control
Real sensorless vector control
Control method
Vector control
(with FR-A7AP/FR-A7AL)
PM sensorless vector control
DC feeding
Operational
Power failure-time deceleration-
functions
to-stop function
Parameter copy
EMC filter
Power supply voltage for control circuit(When
connecting the control circuit separately from the
main circuit power supply.)
FR-A770 DEDICATED SPECIFICATIONS
FR-A770
Pr.570 = "2" (Initial value):
150% 60s at 50°C
Pr.570 = "102":
150% 60s at 40°C
2kHz
not available
Current and temperature derating is
needed
Current and temperature derating is
needed
not available
not available
not available
from A770 to A770 only
not available
380 to 480V 50/60Hz
(This voltage is not same as the
power supply voltage for the main
circuit)
FR-A740-75K-CHT or more
FR-A740-01440-NA or more
FR-A740-02160-EC or more
SLD: 110% 60s, 120% 3s at 40°C
LD : 120% 60s, 150% 3s at 50°C
ND : 150% 60s, 200% 3s at 50°C
HD : 200% 60s, 250% 3s at 50°C
0.7 to 6kHz
(When operating the inverter with a
value larger than 2kHz set in Pr. 72
PWM frequency selection, derate
the inverter rated output current.)







built-in
(The control circuit power supply
voltage is the same as power supply
voltage for main circuit)
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